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Finding the Fourth Proportional to 72,350.70, 108,520.65 and 30,219.90

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Solution

The fourth proportional to 72,350.70, 108,520.65 and 30,219.90 is: 45,327.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,350.70 : 108,520.65 = 30,219.90 : x
  2. Step 2: Convert to fraction form
    72,350.70/108,520.65 = 30,219.90/x
  3. Step 3: Cross multiply
    72,350.70x = 108,520.65 × 30,219.90
  4. Step 4: Simplify right side
    72,350.70x = 3,279,483,190.94
  5. Step 5: Solve for x
    x = 3,279,483,190.94/72,350.70
  6. Step 6: Final answer
    x = 45,327.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.